Altech UL508
MA- Series
Three Phase Adjustable Trip
Miniature Circuit Breakers/
Manual Motor Controllers
The MA was designed to handle the high
inrush loads of 3 phase transformers,
power supplies, motors, etc. The MA
protects wiring and equipment from
damage caused by the three major
classes of over-current, yet greatly reduc-
es the number of nuisance trips in high
starting and inrush current circuits.
An IEC device with excellent ratings under
a UL listing at 480Y/277V (including group
ratings) and at 500V under international
standards, the Altech/ABL Sursum MA
provides short and long term cost effective
circuit protection for USA and/or export
applications. The short term advantages
include: (1) adjustable thermal trip allows
finalization of initial designs before
procurement of the load equipment is
complete; (2) snap-on mounting for readily
available, internationally standardized DIN
Rail saves panel layout design time as well
as installation and change labor; (3) large
cage-clamp terminals with screws suitable
to power screwdrivers, simplifies and
speeds wiring; (4) convenient switched
disconnect during factory testing and/or
initial start-up saves time and aggravation.
The key long term advantage is customer
satisfaction and proven over-current pro-
tection of wiring and equipment (and the
lack of rework/repair costs).
UL508 listed
E137938
CAN/CSA-C22.2 No.14 certified
Type Designation
MA
__
(a)
__
(b)
__
(c)
RT
__
(d)
(a)
= MA - Manual Motor Controller
(b)
= Rated Current
(c)
= U - US Housing
(d)
= Blank - Standard Terminal
RT - Ring-tongue Terminal
Voltage Rating
AIC (Interrupt Capacity)
480Y/277VAC
0.16A-2.5A: 42kA; 4.0A-16A: 14kA; 20A-40A: 10kA
Standard Short Circuit Withstand Rating
0.16A-2.5A: 42kA; 4.0A-16A: 14kA
(UL/CSA Ratings)
Group Short Circuit Ratings
(UL/CSA Ratings)
Typical Life
Calibration Temperature
Standard Pack and Weight
Terminal Size Acceptability
see above
6000 on/off operations with 2xRC
25°C, +0°, -5° (77°F, +0° -9°)
1/450g (1.0 lb.)
Top/Bottom: 18-3 AWG
Type and
Rated
Current
MA0.16U
MA0.25U
MA0.40U
MA0.63U
MA1.0U
MA1.6U
MA2.5U
MA4.0U
MA6.3U
MA10U
MA16U
MA20U
MA25U
MA32U
MA40U
Cat. No.
15.901U
15.902U
15.903U
15.904U
15.905U
15.906U
15.907U
15.908U
15.909U
15.910U
15.911U
15.912U
15.913U
15.914U
15.915U
FLA Dial
Adjustment
Markings
0.1/ 0.12/0.14/0.16
0.16/0.19/0.22/0.25
0.25/0.30/0.35/0.40
0.40/0.48/0.56/0.63
0.63/0.75/0.87/1.0
1.0/1.2/1.4/1.6
1.6/1.9/2.2/2.5
2.5/3.0/3.5/4.0
4.0/4.8/5.6/6.3
6.3/7.5/8.7/10
10/12/14/16
16/17/18.5/20
20/21.5/23/25
25/27/30/32
32/34/37/40
GROUP SHORT
CIRCUIT RATING
AT 480VACa
(and BCP size)
3Ø HORSEPOWER RATINGS AT NOMINAL LINE VOLTAGE
(See Note for HEA Definition)
110-120V
HP (HEA)
200V
HP (HEA)
208V
HP (HEA)
220-240V
HP (HEA)
460-480V
HP (HEA)
42kA
RMS
symmetrical
(max. 1200A
MCCB
or RK5)
Through MA2.5U, ampere rated for motor circuits having a full-
load-amperage (FLA) not exceeding the MA’s general purpose
rated current (RC, equals maximum dial setting) and a locked
rotor current not exceeding 6 times the MA’s RC.
14kA
RMS
symmetrical
(max. 350A
MCCB
or RK5)
10kA
RMS
symmetrical
(max. 350A
MCCB
or RK5)
1/2 (4.0)
3/4 (5.6)
1
2
3
3
5
5
(7.2)
(13.6)
(19.2)
(19.2)
(30.4)
(30.4)
3/4 (3.2)
1
1/2
(6.0)
2
(7.8)
3 (11.0)
5 (17.5)
5 (17.5)
7
1/2
(25.0)
10 (32.0)
3/4
1
1/2
2
3
5
7
1/2
7
1/2
10
(3.1)
(5.7)
(7.5)
(10.6)
(16.7)
(24.2)
(24.2)
(31.0)
1
1
1/2
3
5
5
7
1/2
10
10
(3.6)
(5.2)
(9.6)
(15.2)
(15.2)
(22.0)
(28.0)
(28.0)
2
3
5
10
10
15
20
25
(3.42)
(4.8)
(7.6)
(14.0)
(14.0)
(21.0)
(27.0)
(34.0)
Note:
HEA - Horsepower Equivalent Amperes,
the nominal amperage assigned to standard motor horsepower ratings in design guide tables such as
NFPA-70 Tables 430-248, 430-249, 430-250; UL1077 Table 16.2; CSA - C22.2 No. 235-M89 Tables 44 and 45; CSA-C22.2 No. 14-M91 Table 19, etc. Multiply
HEA values (in parenthesis) by 1.1 if power factor is 90%, and by 1.2 if power factor is 80%.
a The standard-circuit short-circuit rating is 14kA for all types. Group ratings can be used in a standard circuit (e.g., MA1.0U at 42kA), but a higher
standard rating cannot be used in a group circuit (e.g., MA40U at 14kA only in standard circuit.)
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com
32
DIMENSIONS
44mm (1.73 in.)
37.5mm (1.48 in.)
25.5mm (1.0 in.)
6mm (.24 in.)
7mm
(.28 in.)
Minutes
120
60
40
20
10
6
4
2
1
40
20
10
6
4
2
1
MA0.16U-MA16U
MA 3 Phase Controller
Thermal Overload (B, C, D)
“Must Trip” Current = 115% of Dial Setting
“Must Not Trip” > 1 hr = 105% of Dial Setting
45mm (1.77 in.)
89.5mm (3.52 in.)
35mm (1.38 in.)
45mm (1.77 in.)
Tripping time t
Seconds
0.6
0.4
0.2
0.1
Magnetic Trip
Nominal 1100% of Rated Current
7mm (.28 in.)
17.5mm (1.28 in.)
30.5mm
(1.20 in.)
44mm (1.73 in.)
68mm (2.68 in.)
3mm
(.12 in.)
1 1.15 1.5
2 2.3 3
4 5 6 6.9 8 10 12
16 19
Multiple of Dial Setting (Thermal)
Multiple of Rated Current (Magnetic Trip)
Rated Current = Max. Dial Setting
120
60
40
20
10
MA20U-MA40U
MA 3 Phase Controller
Thermal Overload (B, C, D)
“Must Trip” Current = 115% of Dial Setting
“Must Not Trip” > 1 hr = 105% of Dial Setting
1
L1
L2
3
L3
5
Minutes
Tripping time t
Seconds
6
4
2
1
40
20
10
6
4
2
1
MA.16
VDE 0660 AC-3
500V
50-60Mz
12A
10A
14A
16A
40°C
20°C
ABL SURSUM
T1
2
T2
4
T3
6
0.6
0.4
0.2
0.1
Magnetic Trip
Nominal 1100% of Rated Current
52.5mm (2.07 in.)
11.15 1.5
2 2.3
3
4
Multiple of Dial Setting (Thermal)
5 6 6.9 8 1012 15
12.5
MA/USA Manual Motor Controller
Multiple of Rated Current (Magnetic Trip)
Rated Current = Max. Dial Setting
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com
33
Altech UL508
V-EA and MA
Circuit Breaker
Accessories
UL508 listed
E137938
Accessories can be factory or field mounted on V-EA and MA manual motor controllers for enhanced
control and monitoring capabilities. Field mounting kits include all necessary parts and instructions.
Accessories can be gang mounted on a single controller (the Auxiliary Switch in the outside position).
The mounting arrangement links the internal latch-pins for the tripping mechanisms, ensuring simul-
taneous trips. Handles are linked to simplify manual resetting.
FA - Shunt Trip
Type/
Cat. No.
FA12U
FA24U
FA48U
FA110U
Trip/Coil
Voltage
AC or DC
12V
24V
48-72V
110V/220V
Max. Coil
Current
1.3A
0.6A
0.2A
0.25A/0.5A
Approvals
UL
UL
UL
UL
Std.Pk.: 1
Unit Weight: 120 grams (0.27 lb.)
Width: 17.5mm (.689in.)
UA - Undervoltage Trip
Type/
Cat. No.
UA120
UA240
UA277
UA415
UA480
Line Voltage
60Hz*
120VAC
240VAC
277VAC
415VAC
480VAC
Std.Pk.: 1
Unit Weight: 70 grams (0.16 lb.)
Width: 17.5mm (.689in.)
H - Auxiliary Switch
Type/
Cat. No.
H11U
Contact
Rating
10A / 220V AC
3A / 110V DC or pulsed
1A / 220V DC or pulsed
Wire
Size
4mm
2
(12 AWG)
Approvals
UL
For Use With:
V-EA, MA
Std. Pk.: 1
Unit Weight: 45 grams (0.12 lb.)
Width: 9mm (.354in.)
Lock-out **
Cat. No. EASS
Prevent inadvertent
resetting of the V-EA or MA
during maintenance.
Fits 1/4” pad lock.
Cooling Spacer
Cat. No. 15.960
*
Please consult Altech for your 50Hz application needs.
** V-EA and MA can also be locked in the on and off position by simply using a common lead or meter seal, which gets fed through the hole in the handle and
a corresponding hole in the housing.
Altech Corp.
®
• 35 Royal Road • Flemington, NJ 08822-6000 • Phone (908)806-9400 • FAX (908)806-9490 • www.altechcorp.com
34
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